X0304 4 2011-08-02 0001084755 ARIBA INC ARBA 0001440658 Rubaie Ahmed C/O ARIBA, INC. 910 HERMOSA COURT SUNNYVALE CA 94085 0 1 0 0 Chief Financial Officer Common Stock 2011-08-02 4 S 0 10000 30.9622 D 232534 D Common Stock 890 I Through 401(k) Plan Balance includes 114 shares acquired by Mr. Rubaie on 06/30/2011 through participation in Ariba's 401K Retirement program. The shares sold in this transaction were part of Mr. Rubaie's 10b5-1 Plan. Ahmed Rubaie 2011-08-03